Little Help - Deriving an ODE

I need to make a start to a project but already stuck, could someone give me hand deriving an ODE for the below text.

Cheers, RB

http://homepage.ntlworld.com/wilkins/ODE%20Text.txt

I dont know what the hell an ODE is.....but that SCRAM engine is a really cool invention.....it looks beastly too.

I'd love to help if i understood what an ODE was and wth you were talkin about in that thing..haha maybe I should just keep to myself on this one

hey no worries. thanks for looking anyway!!

RB

Firstly, a B1-B lancer weighs anywhere from 177,750 to 214,650 kilograms, and secondly, I also can't help.